Electric fan



FIG. 1 is a perspective view of an electric fan embodying my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a reduced left side elevational view thereof;

FIG. 5 is a reduced right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an electric fan, as shown and described. 